Volume 92,   №1

CALCULATION OF GAS FLOW BETWEEN TWO COAXIAL CYLINDERS IN A FREE-MOLECULAR REGIME UNDER SPECULAR-DIFFUSE BOUNDARY CONDITIONS



Using the method of characteristics, within the framework of the kinetic approach, an analytical solution of the problem on gas heat and mass transfer in a long channel formed by two coaxial cylinders in a free-molecular regime has been constructed. As the basic equation describing the kinetics of the process, use is made of the Boltzmann kinetic equation for a collisionless gas and as a boundary condition of the channel walls — a model of speculardiffuse refl ection. The profi le of the heat fl ux vector in the channel has been constructed, and the gas heat and mass fl ows through the channel cross section have been calculated as functions of the accommodation coeffi cients of the gas molecule pulses tangent to the surfaces of the cylinders
 
 
Author:  O. V. Germider, V. N. Popov,and A. A. Yushkanov
Keywords:  coaxial cylinders, gas fl ow, free-molecular regime, specular-diffuse boundary conditions.
Page:  280

O. V. Germider, V. N. Popov,and A. A. Yushkanov.  CALCULATION OF GAS FLOW BETWEEN TWO COAXIAL CYLINDERS IN A FREE-MOLECULAR REGIME UNDER SPECULAR-DIFFUSE BOUNDARY CONDITIONS //Journal of engineering physics and thermophysics. . Volume 92, №1. P. 280.


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